Nintendo has released System Software version 7.0 for Nintendo 3DS, which includes Miiverse support in addition to several other features. Notably, the system update allows users to link a Nintendo Network ID they've already established on Wii U, or create a new Nintendo Network ID. This functionality allows players with Wii U and 3DS to share a common wallet across the eShop on both systems.

According to Nintendo's website, the following are included in the Version 7.0.0-13U update:

Added Support for Nintendo Network IDs:

• Users can now create or link a Nintendo Network ID, which is required to use some network services, from within System Settings • Nintendo eShop has been updated to support Nintendo Network IDs • For more information regarding Nintendo Network IDs, please visit our Nintendo Network ID introduction page

Added Support for Miiverse:

• Users can now view and post to Miiverse from Nintendo 3DS family systems • For more information regarding Miiverse, please visit our Miiverse introduction page

Added a Software Update Notification:

• A notification will now display when software is started and update data is available

Removed the limit to system transfers:

• The previous limit of five system transfers per system has been removed

Changed the start-up method of Nintendo 3DS Camera from the HOME Menu:

• Pressing the L and R Buttons simultaneously will now start the Nintendo 3DS Camera from the HOME Menu

Improved system stability and usability:

• Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience

I posted a few things on the service, and followed ludist210. That's all I've done so far. Seems okay. I thought this might be a separate app, but it's actually built-in to the system itself. You can suspend your game and check on Miiverse, like you can with the web browser. I was kind of surprised by that.

Nope, no messaging at all. I guess that's kinda unfortunate but since even the Wii U doesn't have a proper notification system, I doubt the 3DS would have had one. At best, the blue link would blink... but then you have to load up Miiverse and check WHY it's blinking. Maybe we'll get it in a future update anyway?

Wow, then I'm much less excited about this update. Sure, the blinking blue light wouldn't be great, but at least you could send a message to an online friend who might actually read it and get back to you promptly. God, why can't Nintendo give us real communication? At this point, I'm assuming that ship has sailed for the 3DS and I'm going to treat it basically as a single player device.

Managed to get the main update just fine, but I can't update StreetPass Plaza or access the eShop. I get messages that supposedly indicate trouble connecting the 3DS to an access point, but Miiverse and other internet stuff works fine. Does anyone else have the same problem?

@VofEscaflowneI got a notification about an available update for StreetPass Mii Plaza today (version 3.3, and I've got 3.2), and there is a red exclamation point symbol on the Check for Updates icon and everything.